HVAC Energy Cost Calculator
Estimate the running cost of your cooling or heating system using your local electricity rate, system size and how many hours a day it runs.
HVAC Energy Cost Calculator
Estimate what it costs to run your cooling or heating system. Rate is pre-filled with the U.S. average — edit it to match your bill.
Your estimated running cost will appear here.
Per month (in season)
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Per year
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Uses an average draw of about 1.2 kW per ton; your actual usage varies with system efficiency (SEER2), weather and settings. This tool provides a rough estimate for general informational purposes only and is not professional advice, a guarantee, or a quote. Results may not reflect your specific situation. Always confirm with a licensed HVAC professional before making any purchase or decision. See our Terms of Service for details.
Frequently Asked Questions
How much does it cost to run an AC per hour?
A 3-ton (36,000 BTU) central AC draws roughly 3–3.5 kW. At an average 16.5¢/kWh that is about 50–60¢ per hour of runtime — but efficiency (SEER2) and local rates change this a lot.
Does a higher SEER save money?
Yes — a higher-SEER2 system uses less electricity for the same cooling. The savings are largest in hot climates with long cooling seasons and higher electricity rates.